WO2018008566A1 - 電源制御装置、及び電源システム - Google Patents

電源制御装置、及び電源システム Download PDF

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Publication number
WO2018008566A1
WO2018008566A1 PCT/JP2017/024265 JP2017024265W WO2018008566A1 WO 2018008566 A1 WO2018008566 A1 WO 2018008566A1 JP 2017024265 W JP2017024265 W JP 2017024265W WO 2018008566 A1 WO2018008566 A1 WO 2018008566A1
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WIPO (PCT)
Prior art keywords
power storage
state
lithium ion
power
storage means
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/JP2017/024265
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English (en)
French (fr)
Japanese (ja)
Inventor
耕平 齊藤
朋久 尾勢
前田　茂
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Denso Corp
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Denso Corp
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Publication date
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Priority to DE112017003429.9T priority Critical patent/DE112017003429T5/de
Publication of WO2018008566A1 publication Critical patent/WO2018008566A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/1423—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with multiple batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present disclosure relates to a power supply control device applied to a power supply system including a plurality of power storage means and a power supply system.
  • connection switching means such as a relay and a switch are provided on each energization path leading to the plurality of storage batteries.
  • the difference in the number of relays and switches on the energization path in the series / parallel state causes a difference in the resistance value of the energization path in each storage battery. Therefore, a difference arises in the charging / discharging current which flows through a some storage battery, and dispersion
  • SOC electrical residual capacity
  • the present disclosure has been made in view of the above problems, and a main purpose thereof is a power supply control device capable of suppressing capacity variation in each power storage unit, and thus allowing appropriate charge / discharge in each power storage unit, And providing a power supply system.
  • the power supply control device of the present disclosure includes a plurality of power storage means and a plurality of switch means provided in an electrical path leading to each power storage means, and the plurality of power storage means connected in parallel to each other and connected in series to each other Applied to a power supply system including a switching unit that switches between the connected serial states.
  • the power supply control device includes a capacity acquisition unit that acquires the remaining electric capacity of each of the plurality of power storage units, and an electric power of each power storage unit acquired by the capacity acquisition unit when the plurality of power storage units are in a parallel state.
  • a current control unit that adjusts a resistance value of a resistance variable unit existing in an electrical path leading to each power storage unit based on a remaining capacity and controls a charge / discharge current for each power storage unit.
  • a power supply system that includes a plurality of power storage means and enables switching between parallel connection and series connection of each power storage means by turning on and off the plurality of switch means
  • SOC main electric capacity
  • the resistance value of the resistance variable unit existing in the electrical path leading to each power storage unit is adjusted based on the remaining electric capacity of each power storage unit.
  • the charge / discharge current is controlled for each power storage means.
  • the magnitude of the charge / discharge current is adjusted for each power storage means, and the remaining electric capacity of each power storage means can be adjusted. As a result, it is possible to suppress variation in capacity among the respective power storage means, and to appropriately charge / discharge each power storage means.
  • a configuration in which a plurality of power storage units may be any configuration having two or more power storage units that can be switched in series-parallel, for example, three or more power storage units.
  • a configuration in which series-parallel switching is performed for at least two of the power storage units is also included.
  • the remaining electrical capacity of the power storage means may indicate the amount of electricity remaining in the total electrical capacity that can be stored in the power storage means, and may include detection errors, redundant use areas, deterioration margins, etc. in the power storage means. It may indicate the amount of electricity remaining in the excluded usable area.
  • FIG. 1 is an electric circuit diagram showing the power supply system in the first embodiment.
  • FIG. 2 is a diagram showing a specific configuration of the switch.
  • 3A is a diagram showing a state in which lithium ion storage batteries are connected in parallel
  • FIG. 3B is a diagram showing a state in which lithium ion storage batteries are connected in series
  • 4A is a diagram showing a current flow during parallel charging
  • FIG. 4B is a diagram showing a current flow during parallel discharging
  • FIG. 5 is a diagram showing the flow of current during series discharge
  • FIG. 6 is a diagram showing the relationship between the gate voltage and the drain-source resistance.
  • FIG. 7 is a flowchart showing a processing procedure for controlling the connection state and charge / discharge current of the lithium ion storage battery
  • FIG. 8 is a flowchart showing a processing procedure following FIG.
  • FIG. 9 is a diagram illustrating the relationship between the SOC difference and the switch resistance value.
  • FIG. 10 is an electric circuit diagram showing the power supply system in the second embodiment.
  • FIG. 11 is a diagram illustrating a state in which lithium ion storage batteries are connected in parallel.
  • FIG. 12 is a flowchart showing a processing procedure for controlling the connection state and charge / discharge current of the lithium ion storage battery
  • FIG. 13 is a flowchart showing a processing procedure following FIG.
  • FIG. 14 is an electric circuit diagram showing a power supply system having another configuration.
  • an in-vehicle power supply device that supplies electric power to various devices of the vehicle in a vehicle that runs using an engine (internal combustion engine) as a drive source is embodied.
  • the power supply system is a so-called dual power supply system including a first power storage device having a lead storage battery and a second power storage device having a plurality of lithium ion storage batteries as the power storage device. .
  • the power supply system includes a lead storage battery 11 and two lithium ion storage batteries 12 and 13, and from each storage battery 11 to 13 to various electric loads 14 and 15 and a rotating electrical machine 16. Can be fed. Further, each of the storage batteries 11 to 13 can be charged by the rotating electrical machine 16.
  • the lead storage battery 11 is a well-known general-purpose storage battery.
  • the lithium ion storage batteries 12 and 13 are high-density storage batteries that have less power loss in charge and discharge and higher output density and energy density than the lead storage battery 11.
  • the lithium ion storage batteries 12 and 13 may be storage batteries having higher energy efficiency during charging / discharging than the lead storage battery 11.
  • the lithium ion storage batteries 12 and 13 are each configured as an assembled battery having a plurality of single cells.
  • the rated voltages of the storage batteries 11 to 13 are the same, for example, 12V.
  • the two lithium ion storage batteries 12 and 13 are housed in a housing case and configured as an integral battery unit U.
  • the battery unit U has two output terminals P1 and P2, among which the lead storage battery 11 and the electric load 14 are connected to the output terminal P1, and the electric load 15 and the rotating electrical machine 16 are connected to the output terminal P2. Has been.
  • the electrical load 14 connected to the output terminal P1 is a 12V system load driven based on 12V power supply from the lead storage battery 11 or the lithium ion storage batteries 12 and 13.
  • the electric load 14 includes a constant voltage request load that is required to be constant or at least stable so that the voltage of the supplied power fluctuates within a predetermined range, and a general electric load other than the constant voltage request load. It is.
  • the constant voltage required load is a load to be protected and is a load in which power supply failure is not allowed. Specific examples of the constant voltage required load include various ECUs such as a navigation device, an audio device, a meter device, and an engine ECU.
  • the electric load 15 is a high-voltage load in which a large driving force is temporarily required, for example, when the vehicle is traveling, that is, a high power requirement may occur.
  • a specific example is an electric steering device.
  • the electric load 14 connected to the output terminal P1 corresponds to a low voltage electric load
  • the electric load 15 and the rotating electrical machine 16 connected to the output terminal P2 correspond to a high voltage electric load.
  • the rotating shaft of the rotating electrical machine 16 is drivingly connected to an engine output shaft (not shown) by a belt or the like.
  • the rotating shaft of the rotating electrical machine 16 is rotated by the rotation of the engine output shaft, while the rotating shaft of the rotating electrical machine 16 is rotated.
  • the rotating electrical machine 16 is an MG (Motor Generator), and has a power generation function for generating power (regenerative power generation) by rotation of the engine output shaft and the axle, and a power running function for applying rotational force to the engine output shaft.
  • the rotating electrical machine 16 is configured to perform adjustment of the generated current during power generation and torque adjustment during powering driving by an inverter as a power conversion device provided integrally or separately.
  • the engine is started and torque assist is performed by driving the rotating electrical machine 16.
  • the rotating electrical machine 16 is an electric load in terms of adding power to the engine output shaft, and is a high power / high current load in comparison with the electric load 14.
  • a switch 17 is provided between the electric load 15 and the rotating electrical machine 16, and the storage batteries 11 to 13 and the rotating electrical machine 16 and the electrical load 15 are electrically connected or disconnected by turning on or off the switch 17. It is like that.
  • the two lithium ion storage batteries 12 and 13 can be switched between a parallel connection state and a serial connection state, which will be described in detail.
  • switches 21 and 22 are provided in series on the electric path L1 between the output terminals P1 and P2.
  • the electrical path L1 is also a part of the energization path where the electrical loads 14 and 15 and the rotating electrical machine 16 are connected to the lead storage battery 11 in the present system.
  • the positive terminal (positive terminal) of the lithium ion storage battery 12 is connected to the first point N1 between the switches 21 and 22, and the positive terminal of the lithium ion storage battery 13 is connected to the second point N2 between the switch 22 and the output terminal P2. It is connected.
  • switches 23 and 24 are provided between the negative terminals of the lithium ion storage batteries 12 and 13 and the ground, respectively.
  • the first point N1 is connected to a third point N3 between the negative terminal of the lithium ion storage battery 13 and the switch 24, and a switch 25 is provided in the connection path.
  • the switches 21 to 25 correspond to “switching units”.
  • Each of the switches 21 to 25 is composed of a semiconductor switching element such as a MOSFET, IGBT, or bipolar transistor.
  • each of the switches 21 to 25 is configured by a MOSFET, and the switches 21 to 25 are turned on and off according to application of a predetermined gate voltage.
  • each of the switches 21 to 25 is configured to have two sets of MOSFETs, and the parasitic diodes of each set of MOSFETs are connected in series so that they are opposite to each other. Good.
  • the parasitic diodes that are opposite to each other completely cut off the current that flows through the path in which the switches 21 to 25 are turned off.
  • the configuration using semiconductor switching elements in each of the switches 21 to 25 may be arbitrary. For example, a configuration in which parasitic diodes of MOSFETs are not arranged in opposite directions may be used.
  • FIG. 3A shows a state in which the lithium ion storage batteries 12 and 13 are connected in parallel
  • FIG. 3B shows a state in which the lithium ion storage batteries 12 and 13 are connected in series.
  • the energization path shown in FIG. 3A is a “parallel energization path”
  • the energization path shown in FIG. 3B is a “series energization path”.
  • the switch 17 is turned off in the parallel state and turned on as necessary in the series state.
  • the switches 21 to 24 are turned on and the switch 25 is turned off.
  • the lithium ion storage batteries 12 and 13 are in a parallel relationship.
  • the output voltages of the output terminals P1 and P2 are both approximately 12V.
  • the lead storage battery 11 and the lithium ion storage batteries 12 and 13 are connected in parallel to the electric load 14 on the P1 side, and the lead storage battery 11 and the lithium ion storage battery are connected in parallel to the rotating electrical machine 16 on the P2 side. 12 and 13 are connected.
  • the electrical load 14 is connected to an intermediate position (first point N1) on the path connecting the positive electrodes of the lithium ion storage batteries 12 and 13 together.
  • the switches 21, 23 and 25 are on and the switches 22 and 24 are off.
  • the lithium ion storage batteries 12 and 13 are connected in series. It has become.
  • the output voltage of the output terminal P1 is approximately 12V
  • the output voltage of the output terminal P2 is approximately 24V.
  • the lead storage battery 11 and the lithium ion storage battery 12 are connected in parallel to the electric load 14 on the P1 side.
  • lithium ion storage batteries 12 and 13 are connected in series to the rotating electrical machine 16 on the P2 side.
  • the rotating electrical machine 16 is connected to a position (second point N2) on the positive electrode side of the storage battery 13 on the high voltage side among the lithium ion storage batteries 12 and 13.
  • the rotating electrical machine 16 is capable of 12V powering driving with a power supply voltage of 12V and 24V powering driving with a power supply voltage of 24V.
  • the rotating electrical machine 16 When the lithium ion storage batteries 12 and 13 are connected in parallel, the rotating electrical machine 16 The rotary electric machine 16 is driven by 24V in a state where the battery is driven by 12V and the lithium ion batteries 12 and 13 are connected in series.
  • the electric load 15 connected to the output terminal P2 is driven by 24V with the lithium ion storage batteries 12 and 13 connected in series.
  • the battery unit U has a control unit 30 constituting battery control means.
  • the control unit 30 switches on / off (opening / closing) the switches 21 to 25 in the battery unit U.
  • the control unit 30 controls on / off of the switches 21 to 25 based on the running state of the vehicle and the storage states of the storage batteries 11 to 13.
  • charging / discharging is implemented using the lead storage battery 11 and the lithium ion storage batteries 12 and 13 selectively.
  • the charge / discharge control based on the storage state of each of the storage batteries 11 and 12 will be briefly described.
  • each lithium ion storage battery 12 and 13 is each provided with the voltage sensor which detects a terminal voltage for every storage battery, and the current sensor which detects an energization current for every storage battery, respectively.
  • the detection result of the sensor is input to the control unit 30.
  • the control unit 30 sequentially acquires the terminal voltage detection values of the lead storage battery 11 and the lithium ion storage batteries 12 and 13 and sequentially acquires the energization currents of the lead storage battery 11 and the lithium ion storage batteries 12 and 13. And based on these acquired values, while calculating OCV (open circuit voltage: OpenageCircuit Voltage) and SOC (residual capacity: State Of Charge) of the lead storage battery 11 and the lithium ion storage batteries 12, 13, the OCV and SOC are calculated. The amount of charge and the amount of discharge to the lithium ion storage batteries 12 and 13 are controlled so as to be maintained within a predetermined use range.
  • OCV open circuit voltage: OpenageCircuit Voltage
  • SOC residual capacity: State Of Charge
  • the lithium ion storage batteries 12 and 13 are basically brought into a parallel state so that the load drive request on the output terminal P2 side and the high voltage power generation for the rotating electrical machine 16 are performed.
  • Each of the lithium ion storage batteries 12 and 13 can be switched to a series state in response to the above request.
  • the control unit 30 temporarily switches the lithium ion storage batteries 12 and 13 from the parallel state to the serial state based on, for example, a drive request for the electric steering device (electric load 15) or a torque assist request by the rotating electrical machine 16. Implement control.
  • the ECU 40 is connected to the control unit 30.
  • the control unit 30 and the ECU 40 are connected by a communication network such as CAN and can communicate with each other, and various data stored in the control unit 30 and the ECU 40 can be shared with each other.
  • the ECU 40 is an electronic control device having a function of performing idling stop control of the vehicle.
  • the idling stop control automatically stops the engine when a predetermined automatic stop condition is satisfied, and restarts the engine when the predetermined restart condition is satisfied under the automatic stop state.
  • the engine is started by the rotating electric machine 16 when the idling stop control is automatically restarted.
  • FIG. 4A shows the current flow during parallel charging
  • FIG. 4B shows the current flow during parallel discharging.
  • a generated current is output from the rotating electrical machine 16, and the lead storage battery 11 and the lithium ion storage batteries 12 and 13 are charged and the electric load 14 is fed by the generated current.
  • the switches 22 and 23 exist in the charging path of the lithium ion storage battery 12, and the charging current Iin 1 flows according to the path resistance including the switches 22 and 23.
  • a switch 24 exists in the charging path to the lithium ion storage battery 13, and a charging current Iin 2 flows according to path resistance including the switch 24.
  • the lithium ion storage battery 13 discharges with the electric load 15 and the rotating electrical machine 16 being discharged, whereas the lithium ion storage battery 12 has the electrical load 15 and the rotating electrical machine. In addition to 16, the electric load 14 is discharged. Therefore, the discharge current Iout1 of the lithium ion storage battery 12 becomes larger than the discharge current Iout2 of the lithium ion storage battery 13, thereby further increasing the SOC difference between the storage batteries 12 and 13.
  • the SOC of each lithium ion storage battery 12 and 13 is varied, there is a disadvantage that the use area of each storage battery 12 and 13 cannot be fully utilized.
  • the control unit 30 corresponds to a “capacity acquisition unit” and a “current control unit”.
  • the resistance value R2 is increased for the switch 24 provided in the energization path of the lithium ion storage battery 13 on the high SOC side.
  • the resistance value R2 is adjusted by controlling the gate voltage Vg of the switch 24 based on the SOC difference (
  • the resistance value R2 of the switch 24, and consequently the lithium ion storage battery 13 side Change the path resistance value.
  • the relationship in which the drain-source resistance increases by lowering the gate voltage Vg is defined with reference to the resistance value Rmin in the normally on state, and the switch resistance value (drain-source resistance) is higher than Rmin. It is variably set to the larger side.
  • the charging current Iin2 flowing through the lithium ion storage battery 13 is reduced, and the charging of the low SOC side lithium ion storage battery 12 is promoted. That is, the path resistance value of the high SOC side lithium ion storage battery 13 is made relatively larger than the path resistance value of the low SOC side lithium ion storage battery 12, and the charging current is controlled for each of the storage batteries 12 and 13. Thereby, the SOC difference of each lithium ion storage battery 12 and 13 can be reduced.
  • the resistance value R1 is increased for the switch 23 provided in the energization path of the lithium ion storage battery 12 on the low SOC side.
  • the resistance value R1 is adjusted by controlling the gate voltage Vg of the switch 23 based on the SOC difference (
  • the resistance value R1 of the switch 23 and thus the path resistance value on the lithium ion storage battery 12 side are changed.
  • the discharge current Iout1 flowing in the lithium ion storage battery 12 is reduced, and the discharge in the high SOC side lithium ion storage battery 12 is promoted. That is, the path resistance value of the low SOC side lithium ion storage battery 12 is made relatively larger than the path resistance value of the high SOC side lithium ion storage battery 13, and the discharge current is controlled for each of the storage batteries 12 and 13. Thereby, the SOC difference of each lithium ion storage battery 12 and 13 can be reduced.
  • FIG. 7 and 8 are flowcharts showing a processing procedure for controlling the connection state and charging / discharging current of each lithium ion storage battery 12, 13, and this processing is repeatedly performed by the control unit 30 at a predetermined cycle.
  • step S11 the SOC of each lithium ion storage battery 12, 13 is acquired, and in the subsequent step S12, the SOC difference of each lithium ion storage battery 12, 13 is calculated. Then, in step S13, the energization current value of each lithium ion storage battery 12 and 13 is acquired.
  • step S14 it is determined whether or not the battery unit U is in a charged state. If the battery unit U is in a charged state, the process proceeds to step S15. If the battery unit U is not in a charged state, the process proceeds to step S31 in FIG.
  • step S14 it is determined that the state of charge is in a state where the amount of power generated by the rotating electrical machine 16 is greater than the amount of power supplied to the load, and the state of discharge is determined if the amount of power supplied to the load is greater than the amount of power generated by the rotating electrical machine 16. It is determined. However, it may be determined whether or not the rotating electrical machine 16 is in a charged state depending on whether or not the rotating electrical machine 16 is in a power generating state.
  • step S15 it is determined whether or not each lithium ion storage battery 12 and 13 is in a parallel state. If the lithium ion storage batteries 12 and 13 are in a parallel state, the process proceeds to subsequent step S16. In step S16, it is determined whether or not a request for switching from the parallel state to the serial state has occurred for the lithium ion storage batteries 12 and 13. If a switching request has not occurred, the process proceeds to step S17, and resistance value adjustment processing in the energization path of each lithium ion storage battery 12, 13 is performed.
  • step S17 based on the SOC difference between the lithium ion storage batteries 12 and 13, a switch to be subjected to resistance adjustment in the energization path of each storage battery 12 and 13 is determined. At this time, when there is a difference in the SOC of each of the lithium ion storage batteries 12 and 13, a switch in the energization path of the high SOC storage battery is set as a resistance adjustment target.
  • step S18 when adjusting the resistance value in the energization path of each of the storage batteries 12 and 13, it is determined whether or not the energization current value flowing in the target path for executing the resistance value adjustment is smaller than a predetermined value. To do. If step S18 is YES, it will progress to subsequent step S19, and if step S18 is NO, this process will be complete
  • step S19 the resistance value of the switch to be adjusted is adjusted.
  • the gate voltage control is performed based on the SOC difference, and the switch to be adjusted is changed to the side where the resistance value in the ON state is increased.
  • the switch resistance value is set according to the SOC difference using the relationship of FIG.
  • switch resistance value is set according to the magnitude
  • the control unit 30 adjusts the switch resistance value by digital analog control or PWM control (the same applies to step S35 described later).
  • step S16 If it is determined in step S16 that a request for switching from the parallel state to the serial state has occurred, the process proceeds to step S20, and it is determined whether or not the SOC difference between the lithium ion storage batteries 12 and 13 is smaller than a predetermined value. To do. If the SOC difference is small, the process proceeds to step S21 to switch from the parallel state to the serial state. If the SOC difference is large, the process proceeds to step S17 and the above-described resistance adjustment process is performed (steps S17 to S19).
  • step S15 If it is determined in step S15 that the state is not the parallel state but the series state, the process proceeds to step S22 to determine whether or not a request for switching from the serial state to the parallel state has occurred for the lithium ion batteries 12 and 13. . If a switching request is generated, the process proceeds to step S23, and switching from the serial state to the parallel state is performed. If no switching request is generated, the process is terminated as it is.
  • step S14 when it is determined in step S14 that the battery is in a discharged state instead of a charged state, in step S31 in FIG. 8, it is determined whether or not each lithium ion storage battery 12 and 13 is in a parallel state, and in a parallel state. The process proceeds to the subsequent step S32. In step S32, it is determined whether or not a request for switching from the parallel state to the serial state has occurred for the lithium ion storage batteries 12 and 13. If a switching request is not generated, the process proceeds to step S33, and resistance value adjustment processing in the energization path of each lithium ion storage battery 12 and 13 is performed.
  • step S33 based on the SOC difference between the lithium ion storage batteries 12 and 13, a switch to be subjected to resistance adjustment in the energization path of each storage battery 12 and 13 is determined. At this time, when there is a difference in the SOC of each of the lithium ion storage batteries 12 and 13, a switch in the energization path of the low SOC storage battery is set as a resistance adjustment target.
  • step S34 when adjusting the resistance value in the energization path of each of the storage batteries 12, 13, it is determined whether or not the energization current value flowing in the target path for performing the resistance value adjustment is smaller than a predetermined value. To do. If step S34 is YES, the process proceeds to the subsequent step S35, and if step S34 is NO, the process ends.
  • step S35 the resistance value of the switch to be adjusted is adjusted.
  • the gate voltage control is performed based on the SOC difference, and the switch to be adjusted is changed to the side where the resistance value in the ON state is increased.
  • the switch resistance value may be set using the relationship shown in FIG. 9 as in step S19 described above.
  • step S32 If it is determined in step S32 that a request for switching from the parallel state to the serial state has occurred, the process proceeds to step S36 to determine whether or not the SOC difference between the lithium ion storage batteries 12 and 13 is smaller than a predetermined value. To do. If the SOC difference is small, the process proceeds to step S37 to switch from the parallel state to the serial state. If the SOC difference is large, the process proceeds to step S33, and the above-described resistance adjustment process is performed (steps S33 to S35).
  • step S31 when it is determined in step S31 that the state is not the parallel state but the series state, the process proceeds to step S38, and it is determined whether or not a request for switching from the serial state to the parallel state has occurred for the lithium ion batteries 12 and 13. . If a switching request is generated, the process proceeds to step S39, and switching from the serial state to the parallel state is performed. If no switching request is generated, the process is terminated as it is.
  • the SOC can be equalized in each of the lithium ion storage batteries 12 and 13, only one storage battery becomes near the upper limit or lower limit of the SOC usage width, thereby suppressing the inconvenience that charging / discharging of the battery unit U is limited. . Therefore, in each lithium ion storage battery 12, 13, it is possible to make maximum use from the SOC upper limit to the SOC lower limit, and it is possible to extend the actual use range of the SOC.
  • each lithium ion storage battery 12 and 13 By suppressing the SOC variation in each of the lithium ion storage batteries 12 and 13, overcurrent caused by capacity self-adjustment between the storage batteries 12 and 13 can be suppressed. Thereby, in the battery unit U, each lithium ion storage battery 12 and 13 and each switch can be protected. That is, if the SOC difference between the lithium ion storage batteries 12 and 13 becomes excessively large, an overcurrent flows between the storage batteries, which may be a cause of failure of each part, but such inconvenience is suppressed.
  • the resistance value in the energization path of the high SOC lithium ion storage battery is set to the resistance value in the energization path of the low SOC lithium ion storage battery.
  • the charging current of each of the lithium ion storage batteries 12 and 13 is controlled relatively larger than the above. In this case, on the high SOC lithium ion storage battery side, the charging current is limited to a low current compared to the low SOC lithium ion storage battery side. Thereby, the charge to the high SOC lithium ion storage battery is limited. Moreover, since the charge to the low SOC lithium ion storage battery is promoted, early charge becomes possible. Therefore, as a result, the variation in SOC of each lithium ion storage battery 12 and 13 can be eliminated.
  • the resistance value in the energization path of the low SOC lithium ion storage battery is relative to the resistance value in the energization path of the high SOC lithium ion storage battery. Therefore, the discharge current of each lithium ion storage battery 12 and 13 is controlled. In this case, the discharge current is limited to a lower current on the low SOC lithium ion storage battery side than on the high SOC lithium ion storage battery side. As a result, discharge from the low SOC lithium ion storage battery is limited, and as a result, variations in the SOC of the lithium ion storage batteries 12 and 13 can be eliminated.
  • the switch resistance value of the energization path of each of the storage batteries 12 and 13 (resistance value of the switches 23 and 24 provided on the negative terminal side) Is changed to a larger side. That is, the configuration is such that the resistance value is increased to the side of increasing the resistance value (minimum resistance value Rmin) in the full-on state of the switches 23 and 24. In this case, the switch resistance value can be changed while suppressing the charge / discharge current from becoming excessively large, and the lithium ion storage batteries 12 and 13 can be protected. Further, considering that the switches 23 and 24 are constituted by semiconductor switching elements such as MOSFETs, resistance adjustment can be easily realized by controlling the gate voltage of the semiconductor switching elements.
  • the resistance value of the switch whose resistance value is to be changed is set based on the charge / discharge current of each lithium ion storage battery 12, 13, taking into account the energy loss caused by increasing the resistance value
  • the resistance value adjustment can be controlled. In this case, when the charge / discharge current of each lithium ion storage battery 12 and 13 is relatively large, the resistance value is decreased, and the resistance value is increased in accordance with the decrease of the charge / discharge current. Thereby, the energy loss due to the switch resistance can be reduced as much as possible.
  • the resistance values of the switches 21 to 25 for switching the series and parallel of the storage batteries 12 and 13 are adjusted, and charging and discharging is performed for each lithium ion storage battery 12 and 13.
  • the current was controlled.
  • the charge / discharge current for each of the storage batteries 12 and 13 is controlled, so that each lithium ion storage battery can be used as desired without complicating the configuration. SOC variations at 12 and 13 can be suppressed.
  • the switches 21 to 25 are constituted by semiconductor switching elements, the charge / discharge current for each of the lithium ion storage batteries 12 and 13 can be easily adjusted by controlling the gate voltage of the MOSFET.
  • each switch 21 to 25 a pair of MOSFETs was used, and a configuration in which the parasitic diodes of these MOSFETs were connected in series so as to be opposite to each other was adopted. As a result, when the switches 21 to 25 are turned off, the current flowing through the energization path can be suitably cut off.
  • the gate voltage control is performed by digital analog control or PWM control for each of the switches 21 to 25 whose resistance value is to be adjusted. Thereby, the desired resistance value can be easily adjusted.
  • PWM control theoretically, the loss due to the current becomes zero when the duty is off, so that a highly efficient system can be realized.
  • the path resistance value is controlled by using the switch for series / parallel switching provided as the basic function of the battery unit U and the control unit 30 for performing the switching control, so that there is nothing to the basic unit configuration.
  • a process for adjusting a desired resistance value can be realized without adding an element or the like.
  • the lithium ion storage batteries 12 and 13 are allowed to shift from the parallel state to the serial state.
  • the resistance value adjustment control in the parallel state is continuously performed, and in a state where the SOC difference is small, the control is performed in series from the parallel state. Transition to state. Therefore, after the transition to the serial state, it is possible to suppress the occurrence of inconvenience due to the SOC difference.
  • the electric load 14 is connected to the intermediate position (N1) of the storage batteries 12 and 13 and rotated to the position (N2) on the positive side of the storage battery 13 on the high voltage side.
  • the load of power supply to each load is different in each of the storage batteries 12 and 13, and SOC variation is likely to occur.
  • the path resistance value of the lithium ion storage battery 13 on the rotating electrical machine 16 side is increased to control the charging current, and when discharging in the parallel state, the lithium ion storage battery 12 on the electric load 14 side is controlled.
  • the discharge current was controlled by increasing the path resistance value. Thereby, the SOC dispersion
  • the second embodiment will be described focusing on the differences from the first embodiment described above.
  • it is set as the structure which comprises three lithium ion storage batteries, and the series-parallel switching is possible about the three lithium ion storage batteries.
  • the structure which comprises four or more lithium ion storage batteries is also possible.
  • the battery unit U has three lithium ion storage batteries B1, B2, and B3, and a connection switching circuit is added with the addition of the lithium ion storage battery.
  • the battery unit U includes switches 51 to 58 configured by semiconductor switching elements. By switching on and off the switches 51 to 58, the lithium ion storage batteries B1 to B3 can be switched between a parallel state and a series state. In the above configuration, a voltage output of 36 V at maximum is possible for the electric load 15 and the rotating electrical machine 16 on the output terminal P2 side.
  • FIG. 11 shows a state in which the lithium ion storage batteries B1 to B3 are connected in parallel in the power supply system of FIG.
  • illustration of the switches 57 and 58 in the off state is omitted.
  • the SOCs of the lithium ion batteries B1 to B3 are SOC1, SOC2, and SOC3, respectively
  • the resistance values of the switches 54 to 56 provided in the energization paths of the batteries B1 to B3 are R1, R2, R3, respectively. It is said.
  • FIGS. 12 and 13 are flowcharts showing a processing procedure for controlling the connection state and charging / discharging current of each of the lithium ion storage batteries B1 to B3, and this processing is repeatedly performed by the control unit 30 at a predetermined cycle.
  • the processes in FIGS. 12 and 13 are implemented by rewriting the processes in FIGS. 7 and 8 described above. The same or substantially the same processes as those in FIGS. Simplify accordingly.
  • step S11 the SOC of each lithium ion storage battery B1 to B3 is acquired, and in the subsequent step S12, the SOC difference of each lithium ion storage battery B1 to B3 is calculated.
  • the control unit 30 calculates the SOC difference by any of the following methods for each lithium ion storage battery. (1) The SOC difference in the combination of two storage batteries among the lithium ion storage batteries B1 to B3 is calculated. (2) The SOC difference between the SOC average value and the SOC of each of the lithium ion batteries B1 to B3 is calculated.
  • step S41 it is determined whether or not all of the lithium ion storage batteries B1 to B3 are in a charged state. That is, it is determined whether or not the storage battery being charged and the storage battery being discharged are mixed due to mutual self-balance in each of the lithium ion storage batteries B1 to B3. At this time, it is preferable to determine whether or not each of the storage batteries B1 to B3 is in a charged state based on the direction of the energization current in each of the lithium ion storage batteries B1 to B3. If step S41 is YES, it will progress to subsequent step S42, and if step S41 is NO, this process will be complete
  • step S41 determines that a discharge current is flowing from any other storage battery to any one of the lithium ion storage batteries B1 to B3 in the power generation state of the rotating electrical machine 16. If step S41 is negative, that is, if it is determined that the discharge current is flowing in any of the storage batteries in the power generation state (charged state of the battery unit U), it is assumed that the battery is in the self-balance state, and this processing is continued. Is terminated. Thereby, the adjustment of the switch resistance value (step S42) is skipped.
  • step S42 the charging currents of the storage batteries B1 to B3 are individually controlled by adjusting the resistance values of the switches 54 to 56 provided for the lithium ion storage batteries B1 to B3.
  • ⁇ SOCxy in (1) above whether or not ⁇ SOCxy is a negative value or a positive value is specified for each lithium ion storage battery. Basically, if the value is a negative value, the change in the passage resistance value is not changed (that is, maintained at the minimum value) so that the lithium ion storage battery corresponding to the ⁇ SOCxy is easily charged. If it is a value, the passage resistance value is increased in order to make the lithium ion storage battery corresponding to the ⁇ SOCxy difficult to be charged.
  • the resistance value R1 of the switch 54 is maintained, the resistance value R2 of the switch 55 is increased, and the width ⁇ R1 is increased. It is determined that the resistance value R3 of the switch 56 is increased by the increased width ⁇ R2.
  • ⁇ SOCx in (2) above whether or not ⁇ SOCx is a negative value or a positive value is specified for each lithium ion storage battery. Basically, if the value is a negative value, the change in the passage resistance value is not changed (ie, maintained at the minimum value) so that the lithium ion storage battery corresponding to the ⁇ SOCx is easily charged. If it is a value, a change on the increase side of the passage resistance value is performed to make the lithium ion storage battery corresponding to the ⁇ SOCx difficult to be charged.
  • step S42 the target resistance values of the switches 54 to 56 (that is, the increments of the resistance values R1 to R3) are corrected based on the energization current values flowing for the lithium ion batteries B1 to B3.
  • the target resistance values of the switches 54 to 56 that is, the increments of the resistance values R1 to R3 are corrected to the decreasing side.
  • the configuration may be such that the reduction correction width is increased as the charging current is increased.
  • the control unit 30 performs gate voltage control based on the target resistance values. As a result, the resistance value in the ON state of the switch to be adjusted is changed to the side that increases.
  • the latter is preferentially charged in the order of lithium ion storage batteries B3 ⁇ B2 ⁇ B1, and accordingly, each of the lithium ion storage batteries B1 to B3. The SOC difference is reduced.
  • steps S41 and S42 when it is determined that the charging current is flowing even though the power generation state (charging state) is present (when step S41 is NO), only the energization path of the lithium ion storage battery in which the charging current flows. Changes to the side where the switch resistance value is increased may be prohibited, and changes to the side where the switch resistance value is increased may be permitted for other energization paths.
  • Step S20 and S21 switching to the serial state is performed on condition that the SOC difference is less than a predetermined value.
  • step S43 it is determined whether or not all of the lithium ion storage batteries B1 to B3 are in a discharged state. That is, it is determined whether or not the storage battery being charged and the storage battery being discharged are mixed due to mutual self-balance in each of the lithium ion storage batteries B1 to B3.
  • step S43 it is preferable to determine whether or not each of the storage batteries B1 to B3 is in a discharged state based on the direction of the energization current in each of the lithium ion storage batteries B1 to B3. If step S43 is YES, the process proceeds to the subsequent step S44, and if step S43 is NO, the process ends.
  • step S43 determines that a charging current is flowing from any other storage battery to any one of the lithium ion storage batteries B1 to B3 when the rotating electrical machine 16 is in a non-power generation state. If step S43 is negative, that is, if it is determined that the charging current is flowing in any of the storage batteries in the non-power generation state (the discharge state of the battery unit U), it is determined that the self-balance state is present, and this processing is performed. It ends as it is. Thereby, the adjustment of the switch resistance value (step S44) is skipped.
  • ⁇ SOCxy in (1) above whether or not ⁇ SOCxy is a negative value or a positive value is specified for each lithium ion storage battery. Basically, if the value is a positive value, the change in the passage resistance value is not changed (ie, maintained at the minimum value) so that the lithium ion storage battery corresponding to the ⁇ SOCxy is easily discharged. If it is a value, the passage resistance value is increased in order to make the lithium ion storage battery corresponding to the ⁇ SOCxy difficult to be discharged.
  • ⁇ SOCx in (2) above whether or not ⁇ SOCx is a negative value or a positive value is specified for each lithium ion storage battery. Basically, if the value is a positive value, the change in the increase side of the passage resistance value is not performed so that the lithium ion storage battery corresponding to the ⁇ SOCx is easily discharged (that is, maintained at the minimum value), and the negative value is maintained. If it is a value, the passage resistance value is increased in order to make the lithium ion storage battery corresponding to the ⁇ SOCx difficult to be discharged.
  • step S44 the target resistance values of the switches 54 to 56 (that is, the increments of the resistance values R1 to R3) are corrected based on the energization current values flowing for the lithium ion batteries B1 to B3.
  • the target resistance values of the switches 54 to 56 that is, the increments of the resistance values R1 to R3 are corrected to the decreasing side.
  • the reduction correction width may be increased as the discharge current is increased.
  • the control unit 30 performs gate voltage control based on the target resistance values. As a result, the resistance value in the ON state of the switch to be adjusted is changed to the side that increases.
  • discharge is preferentially performed in the order of the lithium ion storage batteries B1 ⁇ B2 ⁇ B3, and accordingly, the SOC of each of the lithium ion storage batteries B1 to B3. The difference is reduced.
  • Step S36 and S37 switching to the serial state is performed on condition that the SOC difference is less than a predetermined value.
  • each of the lithium ion storage batteries B1 to B3 when a discharge current is flowing through any one of the lithium ion storage batteries in a power generation state, that is, when a discharge current flows due to self-balance between the storage batteries, the discharge is Priority should be given. Further, in each of the lithium ion storage batteries B1 to B3, when a charging current is flowing through any one of the lithium ion storage batteries although it is not in a power generation state, that is, when a charging current flows due to self-balancing between the storage batteries, the charging is performed. Is preferred. In this regard, the switch resistance value is adjusted on the condition that all the lithium ion storage batteries B1 to B3 are determined to be in either the charged state or the discharged state.
  • a configuration using a battery other than the lithium ion storage battery may be used as the plurality of power storage means.
  • any of a configuration using a storage battery other than a lithium ion storage battery, a configuration using a storage battery and a capacitor, and a configuration using a plurality of capacitors may be used as the plurality of power storage means.
  • the resistance value at the time of switching on the switch for series-parallel switching of a plurality of lithium ion batteries is adjusted, and thereby the charge / discharge current for each lithium ion battery is individually controlled. May be changed.
  • another switch composed of a semiconductor switching element is provided in addition to the switch for series / parallel switching, and the on-resistance value of the other switch is adjusted, thereby charging and discharging each lithium ion storage battery. It is good also as a structure which controls an electric current separately.
  • variable resistance portion In addition to using a semiconductor switching element as the variable resistance portion, it is also possible to use a variable resistor.
  • FIG. 14 is an electric circuit diagram showing a power supply system having another configuration.
  • the battery unit U of FIG. 14 enables switching between the parallel state and the serial state of the plurality of lithium ion storage batteries 12 and 13 as in FIG. 1.
  • P2 can be 12V output and 24V output.
  • switches 61 and 62 are provided in series on the electric path L1 between the output terminals P1 and P2.
  • the positive terminal (positive terminal) of the lithium ion storage battery 12 is connected to the first point N1 between the switches 61 and 62 via the switch 63.
  • the positive terminal of the lithium ion storage battery 13 is connected to the second point N2 between the switch 62 and the output terminal P2, and the switch 64 is provided between the negative terminal of the lithium ion storage battery 13 and the ground.
  • a switch 65 is provided in a connection path connecting the + terminal of the lithium ion storage battery 12 and the ⁇ terminal of the lithium ion storage battery 13.
  • Each of the switches 61 to 65 is composed of a semiconductor switching element such as a MOSFET, IGBT, or bipolar transistor, like the switches 21 to 25 of FIG.
  • the switches 61 to 64 are turned on, the switch 65 is turned off, and the output voltages of the output terminals P1 and P2 are both approximately 12V. Further, in the series state of the lithium ion storage batteries 12 and 13, among the switches 61 to 65, the switches 61, 62, 65 are turned on, the switches 63, 64 are turned off, and the output voltages of the output terminals P1, P2 are almost all. 24V.
  • the 14 is different from that in FIG. 1 in the electrical configuration connected to the output terminal P1, and the lead storage battery 11 and the electrical load 14 are connected to the output terminal P1 via the switch 71.
  • the lead storage battery 11 and the electric load 14 are connected via a series circuit portion of the switch 72 and the power storage means 73.
  • the power storage means 73 is a 12V power source, and is composed of, for example, a lead storage battery.
  • a starter 74 is connected to the output terminal P1.
  • the electric load 14 is a low-voltage load driven by 12V as described above, and the starter 74 is a starter capable of 12V drive and 24V drive.
  • the switch 71 when the engine is started, the switch 71 is turned on and the switch 72 is turned off, so that the starter 74 is driven by 12V by the lead storage battery 11, while the switch 71 is turned off and the switch 72 is turned on.
  • the starter 74 is driven by 24 V by the lead storage battery 11 and the power storage means 73.
  • the starter 74 is driven 24V (high voltage drive) as necessary, so that the engine can be smoothly started. Further, the electric load 14 can be continuously driven by 12V.
  • the lead storage battery 11 or the electrical storage means 73 deteriorates and output performance falls, for example, in the battery unit U, the lithium ion storage batteries 12 and 13 are switched to a serial state, and the battery unit U is used as a power source.
  • the starter 74 is driven by 24V.
  • the lithium ion storage batteries 12 and 13 of the battery unit U are switched to a serial state, and the lead storage battery 11 and the power storage means 73 are charged with 24 V power from the battery unit U.

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  • Engineering & Computer Science (AREA)
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  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Control Of Charge By Means Of Generators (AREA)
PCT/JP2017/024265 2016-07-06 2017-06-30 電源制御装置、及び電源システム Ceased WO2018008566A1 (ja)

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JP2023106918A (ja) * 2022-01-21 2023-08-02 日新電機株式会社 電源装置の制御方法、制御装置、電源装置、配電システムおよび制御プログラム

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JP2008109749A (ja) * 2006-10-24 2008-05-08 Nissan Motor Co Ltd 車両の電力供給装置
JP2010029015A (ja) * 2008-07-23 2010-02-04 Mitsubishi Heavy Ind Ltd 組電池システム
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